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The efficiency of a heat engine increases by 20 when temperature of source is increased...

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The efficiency of a heat engine increases by 20 when temperature of source is increased by 20 and temperature of sink is decreased by 20 simultaneously The old efficiency of the engine is 3 50 4 62 5 1 40 2 42 5 In the arrangement for SHM shown the horizontal ground is smooth and the coefficient of friction between the two blocks is u The time period of oscillation is T The maximum amplitude of vibration so that the two blocks remain together is

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